At a campaign event in Danville, Va., the gaffetastic veep dropped his g’s and picked up a bizarre twang in front of an audience of black voters. Middle-Class Joe swapped his Home Depot apron for an A.M.E. preacher’s robe and sermonized about the big, bad GOP.

Romney’s “gonna let the big banks once again write their own rules,” Biden shouted. “Unnnn-chain Wall Street,” he exclaimed with pulpit bravado. “They’re gonna put y’all back in chains,” the pasty Delaware wheeler-dealer faux-drawled. Extra-emphasis on the “y’all.”

Yes, Biden is rattling chains like an extra in “Roots.” This is the same politician of pallor who cracked jokes about Indians who work in 7-Elevens and who referred to his now-boss as “clean” and “articulate.” Yet, Biden’s demagoguery was met with approving hoots and hollers. Or rather, hollas.

Naturally, the defiant Obama campaign backed up Biden and gave a shout-out of its own. Welcome to the new tone — and the same old slime. Prevaricating spokeswoman Stephanie Cutter (last seen defending the phony, indefensible Romney-killed-a-steelworker’s-wife ad run by Obama Super PAC Priorities USA) chimed in after Biden’s speech. “We have no problem with those comments,” she told MSNBC’s Andrea Mitchell. Biden “was using a metaphor” with which the president agrees.

Democratic Rep. Donna Christensen, the non-voting delegate from the U.S. Virgin Islands to the U.S. House of Representatives, tweeted: “Wait a minute! Are there black people in Va? Guess just not w Romney Ryan! At least not seeing us. We know who’s got our back & we have his.” Left-wing actress Mia Farrow watched the announcement and derided a “whole bunch of white people.” They were joined by countless “progressive” social media users who mocked the GOP’s “white guy, white guy 2012!!!” Sirius XM radio host Dave Rubin — himself the color of discount Charmin toilet paper — called Romney-Ryan “the whitest ticket since the KKK voted for their box social chairperson.”

Gotta love post-racial America!

The poisonous slavery allusion echoed the former pastor of Biden’s boss. Rev. Jeremiah Wright, you may recall, used the same “chains” imagery to justify his “God Damn America” diatribe. “America,” he inveighed in Obama’s old Chicago-based Trinity United Church, put blacks in “chains … and then wants us to sing ‘God Bless America’? No, no, no. Not God bless America; God damn America!”

Biden’s stunt also echoes Hillary Clinton’s infamous black church minstrel performances in which she unleashed a mortifying Southern-spiced-with-street accent to show her street solidarity: “For the last five years, we’ve had No. Power. At. All. And that makes a big difference, because when you look at the way the House of Representatives has been run, it has been run like a plantation. An’ yew know what ah’m talkin’ about.” At an event with race-hustler Al Sharpton, she poured it on thicker: “I’m afraid I’m gonna lift up the rug, and I’m goin’ to see so much stuff uh-nder thar. … You know, what is it about us always havin’ to clean up after people? … But this is not just goin’ to be pickin’ up socks off the floor. This is goin’ to be cleanin’ up the government.”

At least the only thing she manufactured was her patronizing dialect. Remember candidate Barack Obama’s 2007 Selma, Ala., speech? To court black voters, Obama claimed that President Kennedy had sponsored the airlift in Africa responsible for bringing his family to the U.S. and asserted that Selma’s 1965 Bloody Sunday demonstration brought his parents together and led to his birth. Of course, JFK didn’t take office until two years after Obama’s father arrived in the U.S., and the president was born four years before Bloody Sunday.

Obama-Biden 2012: Never let facts, civility or scruples get in the way of a racist racial pander.